West Nile virus Detected in Mosquito Control District

The Benton County Mosquito Control District routinely monitors the mosquito populations within our District boundaries and performs in-house testing of certain species for the presence of West Nile virus (WNV).  A sample from a mosquito trap, that was set on 6/23/2020, has tested positve for WNV.  This area can be viewed by clicking on this link; WNV Map.  The District encourages residents to have readily available and to use a Centers for Disease Control (CDC) approved insect repellent when appropriate.  Please note that it is impossible for the District to monitor all mosquitoes in our area and it should not be concluded that just because a section of the WNV Map is not red in color (indicating the detection of West Nile virus), that there is not the potential for mosquitoes to have the virus.


Aerial (plane) Spraying Scheduled for July 5th or 6th

Due to detection of West Nile virus in a mosquito sample and an unusually high Columbia River, the District will be attempting to spray, with a plane, on July 5th, 6th, or the first available date.  Wind and other factors play a role in deciding whether or not we can put the plane up to spray for the abatement of adult, flying mosquitoes.  The forecast for next number of days calls for higher winds, and right now, July 5th is the first possible date that would work.  You can click on the Fogging Schedule (calendar icon) to the left to be taken to a map to get more information on the areas that we will be spraying.


Coronavirus and District Activities

In response to the coronavirus (Covid-19) pandemic, the Benton County Mosquito Control District is following guidance to try and minimize person-to-person contact.  The District is closing its office to the public, except by appointment.

You may contact us by mail, phone, or email.  We will update our website as conditions change with regards to any modification to the District’s activities.  At this time, we are moving forward with conducting normal mosquito control measures, but will be taking steps to limit contact with the public. These measures will affect how we perform our duties so we appreciate your patience as we navigate this situation.  Thank you for your understanding during this time.




Thank you for visiting the Website for the Benton County Mosquito Control District. Since 1969 we have been providing mosquito control services. We hope that this website answers your questions and increases your knowledge of mosquitoes and mosquito control activities. If you can't find what you're looking for, please feel free to contact us.

The Benton County Mosquito Control District is dedicated to responsibly improving the quality of life and increasing public education in our area. The District accomplishes this by utilizing Integrated Pest Management (IPM) strategies. IPM is designed to utilize cost-effective control measures to reduce mosquito populations and the diseases they potentially carry, while being environmentally sensitive.

Communication and cooperation with property owners, residents and governmental agencies are critical components in the effort to reduce mosquito populations. Benton County MCD strives to be open and responsive to our community.